City report · Gunma, Japan
Isesaki Air quality today
Air quality in Isesaki currently reads AQI 5 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 5
Good
- PM2.5, fine particles (µg/m³)
- 0.7
- tree cover
- 5.3%
- trees in this area
- 16.6K
- more trees needed
- 77.6K
Measured across a 2 km radius around 23 Chuocho, Isesaki, Gunma 372-0042, Japan (12.57 km²), from a satellite image of Jul 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Isesaki · AQI 5 (Good)
Isesaki's tree count comes to 16,650 trees across 12.57 km², 25 points below the 30% tree-cover level considered healthy for this area, so roughly 77,597 more trees would close the gap.
Air quality detail
Air quality in Isesaki today: AQI 5, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 17 ground-station cities within 125 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 17 station cities within 125 km, e.g. Niiza and Noda
Health signal
Air quality is satisfactory for everyone.
PM2.5
0.7
PM10
3.2
NO₂
4.6
O₃
74.0
SO₂
2.0
CO
151.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Isesaki's daily AQI at 39 on average, from 18 on Nov 7 to an hourly peak of 88 on Nov 5.
Where Isesaki stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Isesaki: Critically low
5.3% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
16,650
Target trees
94,247
More trees needed
77,597
CO₂ if planted / yr
1,707 t
Deforestation · 2001–2025
How much forest has Isesaki lost?
Since 2001, the area within 10 km of Isesaki has lost about 8 hectares of forest (about 11 football pitches): 3% of the forest it had in 2000. Most of it (52%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from September 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 8 haabout 11 football pitches
- Share of its forest
- 3%of what there was in 2000
- Cleared for good
- 4 hadeforestation: turned into farms, mines or towns
The worst year was 2018, when about 2 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | under 1 ha | 1 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | 1 ha | 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | 2 ha | under 1 ha | 2 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Isesaki?
- Towns and roadscleared for good54% · 4 ha
- Unknown causescause unknown49% · 4 ha
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 361 ha
- Forest in 2020
- 393 ha
- Overall change
- +32 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Isesaki grew from about 361 hectares to 393 hectares, a net gain of about 32 hectares (+8.9%). New forest grew on about 59 hectares, while 27 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
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Frequently asked
Questions about Isesaki
What is the air quality (AQI) in Isesaki right now?
The latest reading for Isesaki shows an AQI of 5 (Good), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 17 ground-station cities within 125 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Isesaki today?
At AQI 5 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Isesaki been like this week?
Over the last 7 days, the CAMS air-quality model put Isesaki's daily AQI at 39 on average, from 18 on Nov 7 to an hourly peak of 88 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Isesaki lost since 2001?
Since 2001, the area within 10 km of Isesaki has lost about 8 hectares of forest (about 11 football pitches): 3% of the forest it had in 2000. Most of it (52%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Isesaki grew from about 361 hectares to 393 hectares, a net gain of about 32 hectares (+8.9%). New forest grew on about 59 hectares, while 27 hectares were lost.
What is the tree count in Isesaki?
Isesaki has an estimated 16,650 trees across the 12.57 km² measured — 5.3% tree cover, 25 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Isesaki need?
Isesaki needs roughly 77,597 more trees to close a 25-point shortfall against its 30% tree-cover target — about 1,707 t of extra CO₂ absorbed per year once grown.
How are Isesaki's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around 23 Chuocho; the tree count is an estimate derived from that cover.
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